name = "小明"
age = 18
print(name,"的年龄是",age,sep="")
print(name+"的年龄是"+str(age))
print("{}的年龄是{}".format(name,age))


print("圆周率={:.2f}".format(3.1415926))
print("圆周率={:.0f}".format(3.99))

age
